Art of rolling and shearing metal billets or bars



July 7, 1925 1,544,565

v. E EDWARDS ART OF ROLLING AND SHEARING METAL BILLETS OR BARS Filed Nov. 22, 1919 loo I I l k I Inve 77,150

y C sc bs Patented July 7, 1925.

UNITED 1 STATES PATENT OFFICE.

VICTOR E. EDWARDS, OF WORCESTER, MASSACHUSETTS, ASSIGNOB TO MORGAN .COH-

STBUCTION OOIPANY, OF WORCETER, MASSACHUSETTS, A CORPORATION 01' V MASSACHUSETTS.

ART 0! ROLLING AND BKEABING'METAL BILLETS OB- BARB.

Application filed Iovember 22, 1819. Serial Ho. 839,849.

To all whom. it may concern.-

Be it known that L'vioron E. Enwanns a citizen of the United States, residing at Worcester, in the county of Worcester and Commonwealth of Massachusetts, have inventeda new and useful Improvement in the of Rolling and Shearing Metal Bil lets or Bars, of which the followrng, together with the accompanying drawings, is a specification.

The present invention relates to. the rolling and shearing of metal bi'lletsor bars.

In ordinary practice, the continuous production of metal billets or bars by rolling involves the progressive and uninterrupted diminution of the cross section of the stock. until it emerges from the final pass of the continuous billet, merchant or similar mill in the cross sectional form desired for the finished billets or bars. I he stock thus completely reduced, while it is yet emerging from the rolls, is acted upon bya suitable cutting device, known as a flying shear, which divides the same into finished commercial billets or bars of predetermined equzil lengths and/weights.

The output of a billet, merchant or silnilar mill of the type above described is limited by the speed at which the flying shear can 0 erate. Ordinarily, such a mill can ban- (1 ethe output of ablooming mill which roduces up to say one hundred tons per hour. The modern tendency, howevr, is to operate blooming mills at an increased tonna capacity; this is done by giving the blooming mill ample power to insure speed. and by transferring more of its work of reduction to the billet, merchant or similar mill.

If it be attempted to speed up3 the ordinary above described continuous illet. merchant or similar mill sufiiciently to take care of this increased tonnage, a difficulty is at once encountered in the production of bil lets or bars of relatively small section. say of less than four square inches area. This difliculty arises out of the fact that the delivery of completely reduced stock from the final rolls of such a mill, in producing these small sections, would be so rapid as to exceed the limit of speed at which the flying shear can operate. In other words, at the highest speed at which a flying shear can operate, it is impossible for the ordinary billet, merchant or similar mill, rolling down to sections of less than four square inches, to keep out of the we of the out ut of a modern high tonnage b ooming mi In order to meet the large demand for billets or bars of smaller sections, and at the same time provide a mill that will take care of the output of a modern high tonn blooming mill, it is proposed by the present invention to introduce-a variation in the usual billet or merchant mill procedure of first reducing the stock completely, and thereafter cutting it into the desired lengths. This variation involves a rearrangement of the usual mill apparatus employed in the elongation, reduction and cuttin -of the stock, and for,the purpose of ii ustrating one way in which the invention is susce tible of being put intopractice, the single gure of the accompanying drawi s may be referred to as a diagrammatic s owing of the new arrangement.

In the billet or merchant mill, as illus trated in said fi ure, a train of rolls 1, 1 is shown as provi mg the requisite number of passes for the reduction of the stock to a section somewhat larger than that contemlated for the smaller finished billets or ars. As the stock emerges from the rolls 1, 1, it is acted upon by a flying shear 2, the operation of which ma be controlled by any well known form 0 trigger or measuring device, and is set so as to procure the division of the stock by the shear into pieces that correspond in weight to the bars or billets desired: to be produced, but which pieces are shorter and of greater cross section than said finished bars or billets apparatus of this type is shown and described, I

for instance, in United States Letters Patent to Edwards, No. 1,104,349, dated July 21, 1914, and since said apparatus, of itself, forms no part of the present invention, a detailed description thereof is unnecessary. The shearing of the stock is thus accomplished at an intermediate 'oint in the re duction of the same where e eed of the stock is within the speed limit 0 the shear, thus enabling the latter to operate, notwithstanding the fact that the rolls 1, 1 are handling, and keeping up with, the entire output of the blooming mill. Following the lli creased, by myinvention, substantiall shear'fllg operation at this intermediate point in the reductiojlflof the billets, the stock is delivered by suitable conveying devices 3 to one or more additional stands of reducing rolls 4, 4, arranged 2 cont 'uouslyj or in tandem, wherein the final red liction of the short sheared pieces to billets or bars of the desired small cross section is .efiected, following which said finished bars or billets are delivered to the usual oooljng'bed, not shown.

It will be obyious that with any igiven speed; limit on the operation of the ying sheet 2, the capacity-of a billet mill for the production of small cross sections is inin the proportion that the area of a stoch at the point of shearingbears to the area of the stock at the point of finishing. For example, in the production of one and onehalf inch billets, or bars, if the shearing be done ata section two incheszsquare, the ton- :1 output ofsuchbillets, or bars, would 7 be increased upwardsof seventy-five per cent with any 'venlspeed' limitof'the'shear; in other Weiss, the tonnage capacity of the billet, merchant qnsimn rmiu as above described wouldbe mm nve per cent greater than the tonnage capacity of a billet, merchant or similar mill of 'the'ordlnary type.

I claim, I

1. The improvement iii-the art of continuously rollin and; shearing hot metal bars or billets, w"ch consists in rolling the bars in a continue 3 mill, and simultaneously cut- ;ting up the b rs by a flying shea-r before the continuous rolling is eompleted whereby to rmitfinishi of the bars to the desired while b11251 ing at a speed beyond the operating limit of said shear.

2. In e production of billets or bars of small cross section, by hot rollingsin a con- "tinuous mill the improvement which consists in c'uttm the stock transversely into fore the reduction there6f is mmplete short pieces that correspond in weight to the finished billets or bars.

3. In acontinuons billtmill for the reduction of blooms to bars or billets of rela- '.tively small cross-section, out to predetermined lengths, the combination with reduc ing rolls operable successively on stock, of a flying iahear operable on the stock in process of reduction and before it reaches the final reducing rolls of the continuous mill, whereby to permit passage of the stock through said final reducing rolls at 'a speed beyond the operating of said shear.

4'. The ini'proved method of producing billets or bars of relatively small cl'oessection, by hot rolling in a continuous billet mill, which onsists in cutting the stockin said billet mail by a flying shear at as intermediate point in its reduction, and thereafter completing the reduction of the short aevered pieces at a speed beyond the operating limit of said shear, whereby to make the capacity of said will independent of the operating speedlimit of said shear.

5. In the art of continuously rolling bars L or billetsof small cross sect10n,- went whi'chjconsists in procuringseverance of thelstock into short pieces at corresponding wei ht to the finished com-.

mercial bars pr b' lets, while in process 0d reduction by said continuous roll-mg.

6. The herein described new method of W VICTOR n. EDWARDS.

6 rolls 4, 4, arranged continuously or in tandem, wherein the final red ction of the short sheared pieces to billets or bars of the desired small cross section is efi'ected, following which said finished bars or billets are 10 delivered to the usual coolingbedmot shown.

It will be obvious that with any iven (1 limit on the operation of,the flying wear 2, the capacity of a billet mill forthe production of small cross sections is in- 15 creased, by my invention, substantiall in the proportion that the area of a stoc at the point of shearin bears to the area of the stock at the pomt of finishing. For exam le, in the production of one and one half inch billets, or bars, if the shearing be done at a section two inchessquare, the tonnage output of such billets, or bars, would be increased upwards of seventy-five per cent with any given speed limit of'the shear; in

2 other words, the tonnage capacity of the billet, merchant or similar mill as above described would be seventy-five per cent greater than the tonnage capacity of a billet, merchant or similar mil] of the ordinary type.

I claim, 7 1. The improvement in the art of'continuously. rollin and shearing hot metal bars or billets, w ich consists in rolling the bars in a continuous mill, and simultaneously cutting up the bars by a flyingshear before the continuous rolling is completed, whereby to f7 permit finishing of the bars to the desired 'size while travelling at a speed beyond the operati limit of said shear.

2. In t e production of billets or bars of small cross section, by hot rolling in a continuous mill the improvement which consists in cuttln the stock transversely. before the reduction thereof is completed, into short pieces that correspond in weight to the finished billets or bars.

nuance a. In a continuous billet mill for the reduction of blooms to bars or billets of relatively small cross-section, cut to predetermined lengths, the combination with reducing rolls operable successively on the stock, of a flying shear operable on the stock in process of reduction and before it reaches the final reducing rolls of the continuous mill, whereby to permit passage of the stock through said final reducmg rolls at a speed beyond the operating limit of said shear.

4. The improved method of producing billets or bars of relatively small cross-section, by hot rolling in a continuous billet mill, which ponsists in cutting the stock in said billet mill by a flying shear at an intermediate point in its reduction, and thereafter completing the reduction of the short oercred ieces at a s d be 0nd the o ratin limit of said 8115:: whzreby to nilfke th capacity of said mill independent of the operating speed limit of said shear.

5. In the a'rt of continuousl or billets of small cross sectlon, improvement which consists in procuring transverse severance of the stock into short pieces at corresponding wei ht to the finished coma rocess of mercial bars or bi lets, while in reduction by said continuous rolling.

6. The herein described new method of rolling bars I rolling and shearing metal bars and billets,

which consists in roughing the stock in a cont nuous mill, shearing it to finished weights in a flying shear and then finishing the sheared roll passes.

7. In the production of rolled bars and billets of predetermined equal lengths, the improvement which consists in shearing the stock to the finished weights one or more roll passes in advance of the finishing, thereby permitting full freedom of reduction in the finishing mll passes.

Signed this 15th day of November, 1919.

VICTOR E. EDWARDS.

pieces in one or more additional Certificate of Correction It is hereby certified that in Letters Patent No. 1,544,565,

anted July 7, 1925,

u n the a lication of Victor E. Edwards, of VVorccster. r assachusetts, for an ii gro'vemeiit in The Art of Rolling and Shearing Metal Billets or Bars, errors appear in the printed s cilication requiring (OTI'QCUOIIQS follows: Page 2, lineclaim 5, before the wor improvement insert the article the, and lines 72 and 73,

for the words at corresponding rea d tlzm correspond in, and thlt Patent should be read with these corrections therein that the same mien to the record of the case in the Patent Ofiice. I

Signed and sealed this 18th day of August, A. D. 1925.

Acting -isms:

Certificate of Correction It is hereby certified that in letters Patrnt No. 1,544,565, granted J uly 7, 1925, upon the application of Victor E. Edwards, of Worcester, Massachusetts, for an improvement in The Art of Rolling and Shearing Metal Billets or Bars, errors tLFPBa! in the printed s cification requiring correction as follows: Page 2, 0 sum 5, before the wor improvement insert the article the and lines 72 and 73, for the words at corresponding read that (om-expand in; and *thlt Patent should be read with these corrections therein that the same miyao'onfo'rm' to the record of the case in the Patent Oflioe.

Signed and seeled this 18th day of August, A. D. 1925. 

